Posted November 30, 201410 yr I've downloaded this crackme long time ago. Its difficult could be 2/10 but it's really funny and, above all, instructive. If you want to try something different ... Crackme.rar
November 30, 201410 yr Author yes ... the main purpose of this type of challlenge is examine the file and then, find its secret! A good start point is an Hex editor and, obviously, internet search! :-)
November 30, 201410 yr Solution Solution: PEEKPOKE Tutorial: Open up 'Cr4ckM3' in your favorite hex editor First check if you can find the signature (first 4-8 bytes) on google: 3F 3F 3F 3F or 31 35 34 31 have no interesting results, let's look further down. If you scroll down to 0x2D0 you will find a commonly-occurring pattern: A5 29 4A 52 94 <- various intersting hits on google! First link: http://ist.uwaterloo.ca/~schepers/formats/G64.TXT tells us the file should start with 47 43 52 2D instead of 3F 3F 3F 3F. Change this and save the file with the extension .g64 Download WinVICE (commodore 64 emulator): http://www.zimmers.net/anonftp/pub/cbm/crossplatform/emulators/VICE/WinVICE-2.3-x86.zip Open 'x64mm.exe' and use 'File->Autostart Disk image' and select our saved .g64 Appears to be running: Download http://style64.org/dirmaster to browse the contents of the .g64 file Let's look inside "SECRET": Try "PEEKPOKE" as code and everything appears to be in order: Mr. eXoDia Edited November 30, 201410 yr by Mr. eXoDia
December 1, 201410 yr The [crackme] tag has been added to your topic title. Please remember to follow and adhere to the topic title format - thankyou! [This is an automated reply]
December 1, 201410 yr Author Well done Mr. eXoDia! Your solution is certainly faster than mine ... probably an old C*4 user would have had a different approach
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